Application cleanup

[ovv]

Imrpove application cleanup. This might need another pass
after #112 is merged

Issue #91 #92

This also add a timeout argument to dialog.request

[codecov-io]

Codecov Report

Merging #113 into master will increase coverage by 2.1%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #113     +/-   ##
=========================================
+ Coverage   71.52%   73.62%   +2.1%     
=========================================
  Files          15       15             
  Lines        1531     1547     +16     
  Branches      265      267      +2     
=========================================
+ Hits         1095     1139     +44     
+ Misses        319      298     -21     
+ Partials      117      110      -7

Impacted Files	Coverage Δ
aiosip/dialog.py	77.89% <100%> (+4.39%)	⬆️
aiosip/application.py	77.27% <100%> (+5.46%)	⬆️
aiosip/peers.py	74.13% <0%> (+0.77%)	⬆️
aiosip/utils.py	66.66% <0%> (+2.56%)	⬆️
aiosip/transaction.py	66.21% <0%> (+5.4%)	⬆️

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[vodik]

Looks good to me.

[vodik]

So the tag gets added as part of the inbound processing? Okay, I think that might should be okay. Might be a little surprising if you dump the message as you don't see the original message anymore, but should be okay.